Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

48.0°F

Measurement Time: Thursday, January 15, 2026, 12:30 AM PST

Temperature Locations

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Local Points of Interest

Stanislaus National Forest; Colfax Spring, CA; Mather, CA; Harden Flat, CA

Tuolumne River

Station Name: TUOLUMNE R BL EARLY INTAKE NR MATHER CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,369 feet

Nearest Address:
Cherry Lake Rd
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.8815908, -119.9701824

Nearby Water Temperatures

Tuolumne River, Groveland, CA (1.3 mi)
Cherry Creek, Groveland, CA (6.6 mi)
Tuolumne River, Groveland, CA (10.1 mi)
Tuolumne River, Groveland, CA (17.1 mi)
Merced River, Yosemite Valley, CA (24.7 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (51.3 mi)
Deadman Creek, Mammoth Lakes, CA (57 mi)
Hot Creek, Mammoth Lakes, CA (62.8 mi)
Hot Creek, Mammoth Lakes, CA (63.4 mi)
San Joaquin River, Friant, CA (63.4 mi)
Hot Creek, Mammoth Lakes, CA (64.6 mi)
Trout Creek, South Lake Tahoe, CA (71.7 mi)
Upper Truckee River, South Lake Tahoe, CA (71.9 mi)
General Creek, Tahoma, CA (81.3 mi)
South Fork American River, Rescue, CA (82.9 mi)

Weather for Groveland, California

Current Weather

48°F
Sunny
Sunny
43.3°F
48°F
46%
ENE 6 mph
12.7 mph
43.3°F
27.1°F
0 in
0%
9 mi
1021 mbar
0.2

Five Day Weather Forecast

Sunny
Thu
H: 67°F
L: 46°F
Sunny
Fri
H: 64°F
L: 44°F
Sunny
Sat
H: 63°F
L: 42°F
Sunny
Sun
H: 63°F
L: 52°F
Sunny
Mon
H: 61°F
L: 49°F

Air Quality

PM2.5: 2.95 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 152.85 μg/m3
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:05 PM
Daylight: 9 hrs 51 mins
Moonrise: 5:07 AM
Moon Transit: 9:37 AM
Moonset: 2:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

5:25 PM - 7:55 PM
9:07 AM - 11:37 AM

Minor Periods

1:38 PM - 3:08 PM
4:37 AM - 6:07 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued January 15 at 3:27AM PST until January 15 at 10:00AM PST by NWS Sacramento CA

Effective: Thu January 15, 2026, 3:27 AM
Expires: Thu January 15, 2026, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Northern San Joaquin Valley, Southern Sacramento Valley and the Delta. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued January 14 at 8:47PM PST until January 15 at 11:00AM PST by NWS Hanford CA

Effective: Wed January 14, 2026, 8:47 PM
Expires: Thu January 15, 2026, 5:00 AM

* WHAT...Visibility one quarter mile to as low as 200 feet in dense fog. * WHERE...A portion of central California. * WHEN...Until 11 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways include, but are not limited to, Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Thursday, January 15, 2026

Weather Forecast

Sunny
66.6°F
46.4°F
58°F
45%
0 in
0%
0%
6.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.49 μg/m3
PM10: 3.65 μg/m3
Carbon Monoxide: 158.01 μg/m3
Nitrogen Dioxide: 5.81 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 64.28 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:05 PM
Daylight: 9 hrs 51 mins
Moonrise: 5:07 AM
Moon Transit: 9:37 AM
Moonset: 2:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

5:25 PM - 7:55 PM
9:07 AM - 11:37 AM

Minor Periods

1:38 PM - 3:08 PM
4:37 AM - 6:07 AM

Action Rating: 3 out of 5

Friday, January 16, 2026

Weather Forecast

Sunny
63.9°F
43.9°F
55.2°F
46%
0 in
0%
0%
6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.35 μg/m3
PM10: 3.46 μg/m3
Carbon Monoxide: 151.37 μg/m3
Nitrogen Dioxide: 5.71 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 65.2 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:09 AM
Sunset: 5:06 PM
Daylight: 9 hrs 52 mins
Moonrise: 6:00 AM
Moon Transit: 10:30 AM
Moonset: 3:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

6:18 PM - 8:48 PM
10:00 AM - 12:30 AM

Minor Periods

2:32 PM - 4:02 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

Saturday, January 17, 2026

Weather Forecast

Sunny
62.8°F
41.7°F
51.5°F
53%
0 in
0%
0%
6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.03 μg/m3
PM10: 3.17 μg/m3
Carbon Monoxide: 150.65 μg/m3
Nitrogen Dioxide: 5.89 μg/m3
Sulphur Dioxide: 1.74 μg/m3
Ozone: 67.44 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:10 AM
Sunset: 5:07 PM
Daylight: 9 hrs 53 mins
Moonrise: 6:48 AM
Moon Transit: 11:22 AM
Moonset: 4:02 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:10 PM - 9:40 PM
10:52 AM - 1:22 PM

Minor Periods

3:32 PM - 5:02 PM
6:18 AM - 7:48 AM

Action Rating: 4 out of 5

Sunday, January 18, 2026

Weather Forecast

Sunny
62.6°F
51.9°F
55.6°F
48%
0 in
0%
0%
5.4 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.5 μg/m3
PM10: 4.66 μg/m3
Carbon Monoxide: 226.93 μg/m3
Nitrogen Dioxide: 11.15 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 46.54 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:10 AM
Sunset: 5:08 PM
Daylight: 9 hrs 55 mins
Moonrise: 7:27 AM
Moon Transit: 12:14 AM
Moonset: 5:06 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

8:01 PM - 10:31 PM
11:44 AM - 2:14 PM

Minor Periods

4:36 PM - 6:06 PM
6:57 AM - 8:27 AM

Action Rating: 4 out of 5

Monday, January 19, 2026

Weather Forecast

Sunny
61.1°F
49°F
52.9°F
49%
0 in
0%
0%
5.1 mph
0


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:10 AM
Sunset: 5:09 PM
Daylight: 9 hrs 56 mins
Moonrise: 8:02 AM
Moon Transit: 1:03 PM
Moonset: 6:12 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

8:49 PM - 11:19 PM
12:33 AM - 3:03 PM

Minor Periods

5:42 PM - 7:12 PM
7:32 AM - 9:02 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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